Valve-gear.



L. KING.

VALVE GEAR.

APPLIOATION nun AUG. 28- 1908.

Patented May 11, 1909.

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VALVE GEAR.

APPLICATION FILED AUG 28 1908.

921,41 3. f Patented May 11, 1909.

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Wit" be:

UNITE LYNN KING, OF LYMAN, MISSISSIPPI.

VALVE-GEAR.

Application filed August 28, 1908.

T 0 all whom 'it concern:

Be it known that I, LYNN Kine, a citizen ofthe United States, residingat Ly an, in the county of Harrison and State of Mississippi, haveinvented a new and useful Valve-Gear. of which the following is aspecification.

This invention relates to locomotive valve gear and has for itsprincipal object to provide a novel form of gearing in which the usuallink motion is dispensed with, provision being made for readilyadjusting the point of cut off of the valve, and for secur ing reverseof the engine when desired.

A further object of the invention is to provide a novel means forreadily altering; the lead of the valve.

With these and other objects in view, as will more fully hereinafterappear, the invention consists in certain novel features of constructionand arrangement of parts, more fully hereinafter described, illustratedin the accompanying drawings, and more particularly pointed out in. theappended claims, it being understood that various changes in the form,proportion, size and minor details of construction may be made withoutdeparting from the spirit or sacrificing any of the advantages of theinvention.

In the accompanying drawings :-Figure 1 is a side elevation of alocomotive valve gear constructed in accordance with the invention. Fig.2 is a similar view of a portion of the same showing the parts reversed.Fig. 3 is a vertical section on the line 33 of Fig. 2, the view beingdrawn to an enlarged scale.

Similar characters of reference are employed to indicate correspondingparts throughout the several figures of the drawin gs.

In Fig. 1 there are shown the usual cylinder A, steam chest B, pilotwheels C and the front driver D, all of which may be of the ordinaryconstruction. The piston is connected to a cross head E, and transmitsmotion to the forward driver through a connecting rod F.

Mounted on the upper cross head guide is a frame 10 to which is pivoteda bar 11, the lower portion of which has an enlarged loop 12approximately circular in form, the upper and lower walls of the openingbeing continued in the form of vertical slots 13 and 14, both of whichare arranged in the longitudinal aXis of the bar 11. This barSpecification of Letters Patent.

Patented May 11, 1909.

Serial No. 458,730.

receives motion in the manner hereinafter described and transmits motionto the valve rod 15, there being a pin and slot connection between thebar and rod in order to allow the free oscillatory movement of the bar.The valve rod is made in two sections, and these are connected by atoggle joint 16 that is suspended from a link 17 carried by theapproximately horizontal arm of a bell crank lever 18 that is pivoted onthe frame 10. The approximately vertical arm of the bell crank lever isconnected by a rod 19 to a lever 20 that is provided with the usuallatch bolt movable over a notched locking quadrant 21 in the cab of theengine. By moving the lever 20 the link 17 may be raised or lowered andthe distance between the two sections of the valve rod may becorrespondingly altered. This will result in shifting of the valve sothat the lead of the valve will be adjusted.

it'lounted in the frame 10 is a tumbling shaft 22 one end of whichcarries an arm 23 dial; is connected by a rod 2%; to a reversing lever25, having a latch bolt of ordinary construction arranged to engage thenotches of the locking quadrant 26. The outer end of the shaft carriesan arm 28 from which is suspended a link 29 and the lower end of thelink is connected by a pin 30 to a second link 31, the forward end ofwhich is fulcrumed on the frame 10. On the pin 30 is fulcrumed a twoarmed lever 33 the upper and lower ends of which are connected by rods35 to the straps of a pair of eccentrics mounted on the axle of theforward driver,

these eccentrics being preferably arranged in the manner usuallypracticed in link motions and transmitting to the lever 33 a movementsomewhat similar to that imparted to the ordinary link. Projecting fromthe upper and lower ends of the lever 33 are pins 37 and 38, the pin 37being ar ranged to enter the slot 13, and the pin 38 entering the slot14, although only one pin is in working position at one time.

hen the upper pin 37 is in engagement with the slot 13 and the engine isrun for ward the lever 33 will be rocked with the pin 30 as a center andthe pin 37 being entered in the slot 13 will oscillate the bar 11 andwill thus transmit movement to the valve rod 15. The extent of thismovement is, of course, in direct proportion to the distance between thefulcrum of the bar 11 and the pin 37, and this distance may be alteredby a suitable adjustment of the lever 25. By I rod and provided at itslower portion with raising the lever 33 the stroke of the valve may beincreased and its speed of travel also increased so as to cut offshortly after the commencement of the stroke of the piston, while bylowering the lever the length of the stroke and the speed may bedecreased so as to admitsteam for a greater length of time. hen it isdesired to reverse, the lever 25 is pulled back to the fullest extent,thus dropping the lever 38 so that the pin 37 will pass from the slot 13and the lower pin 38 will enter slot 14:, the pin being guided down intothe slot by the flaring walls which merge from the circular portion ofthe opening 12 into the walls of said slot. When down in the slot 14 thesame movement which, imparted to the lever whenin the position shown inFig. 1, would move the valve in a forward direction, will now move thevalve in a rearward direction, and steam will therefore he admitted atthe opposite end of the cylinder, and the direction of travel reversed.lVhen the pin 38 is in the slot 14: the lever 25 may also be adjustedfor the purpose of altering the point of cut olf.

It will be obvious that with the lever 25 in an intermediate or neutralposition the valve will have no travel, thus providing for movement ondown grades without power.

hat is claimed is 1. In a valve gear, a support, a valve rod, apivotally suspended bar connected to said an enlarged opening and withapair of alined slots that connnunicate with the opening, an eccentricactuated lever having a pair of pins arranged to enter said slots, atumbling shaft, an arm extending therefrom, a link suspended from thearm and forming a pivotal support for the lever, a secondary linkconnecting the pivot point of the lever to the support, and a reversinglever connected to the tumbling shaft and adapted to adjust the positionof the lever to thereby vary the point of cut off and reverse theengine.

2. In a valve gear, a valve rod, a pivotally suspended bar connected tosaid rod, and provided at its lower end with an opening, and with a pairof alined slots communieating with said opening, a lever pivotallysupported intermediate its ends, and carrying pins on opposite sides ofits pivot arranged to alternately enter the aforesaid slots, eccentricsconnected to the respective ends of the lever, supporting links for thelever connected to the pivot thereof, and means for adjusting said linksto shift the lever.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

LYNN KING.

WVitnesses:

JACK KING, S. E. KING.

